@misc{indiciae752a0d7327e9,
  title = {28 preliminary geologic maps covering a part of the Navajo and Hopi Indian Reservations},
  author = {J. W. Harshbarger},
  year = {1954},
  doi = {10.3133/ofr54116},
  url = {https://pubs.usgs.gov/publication/ofr54116},
  note = {Source identifier: ofr54116}
}